Read the table rules

There is no single “basic strategy”

The correct action in blackjack depends on the rules of the specific table. Deck count, the dealer’s soft-17 rule, doubling restrictions, double after split, surrender, and the dealer-blackjack protocol can each move chart cells. A trainer with one unlabeled chart would sometimes teach the wrong play, which is why this site grades against a verified chart for the exact rules profile you select.

The summary line used across the site — for example 6D · H17 · DAS · LS · 3:2 — packs the whole profile into a few abbreviations. This lesson teaches you to read it.

The payout: 3:2 versus 6:5

The natural-blackjack payout is the first number to check on the felt. At a 3:2 table, a natural wins 1.5 times your wager; at a 6:5 table, it wins only 1.2 times. Changing only that payout from 3:2 to 6:5 adds about 1.39 percentage points to the house edge — a very large penalty for one rule.

Because naturals are rare in any one session, the damage is easy to underestimate. But table selection can matter more than memorizing small chart exceptions: no amount of correct play at a 6:5 table buys back what the payout takes away. This site marks 6:5 profiles with an Avoid badge and never sorts them above a comparable 3:2 game just because they use fewer decks.

• —3:2 — a 10-unit natural wins 15 units. This is the player-friendly standard, and all three playable profiles use it.
• —6:5 — the same natural wins only 12 units. It adds roughly 1.39 percentage points to the house edge compared with 3:2. Avoid it.
• —1:1 — even money on a natural, found on some novelty games. Worse than 6:5; treat as a different game entirely.

H17 versus S17

The soft-17 rule is printed on the felt (“Dealer must hit soft 17” or “Dealer stands on all 17s”) and it changes both the house edge and specific decisions — it is not a detail to skip.

• —H17 — the dealer hits soft 17. This is worse for the player. In this trainer’s six-deck charts, H17 also makes 11 vs ace, A,7 vs 2, and A,8 vs 6 doubles; those hands do not double under S17. Some surrender cells against an ace change too.
• —S17 — the dealer stands on all 17s. Friendlier, with its own chart; the favorable launch profile pairs S17 with late surrender and resplit aces.

Decks, DAS, doubling range, and surrender

• —Deck count — single, double, and multi-deck games use different charts. Even where two charts look nearly identical, this site treats them as separate profiles so corrections never leak across games.
• —DAS / NDAS — double after split allowed (or not). DAS makes several pair splits profitable that are hits without it — 6,6 against a 2 splits with DAS and hits without it.
• —Doubling range — some games restrict doubling to hard 9–11 (D9–11) or hard 10–11 (D10–11). The preferred action stays the same; the fallback — “Double; otherwise hit” — is what you actually play.
• —Surrender — late surrender (LS) lets you forfeit half the wager after the dealer checks for blackjack; early surrender (ES) comes before the check and is far more valuable but rare.
• —Peek / ENHC / OBO — the dealer-blackjack protocol. It decides whether your double and split wagers are exposed to a dealer natural, and it gets its own lesson.

Reading a real table

Before you sit down anywhere, identify the payout, the soft-17 rule, the deck count, and whether doubling after split and surrender are offered. Geographic or channel labels — “Atlantic City–style,” “live dealer” — are not proof of the actual rules at a specific table; verify the felt and the posted rules.

In this trainer you never have to guess: the active profile is always visible during practice, and the Rules catalog shows the full definition of every preset, including the ones still pending strategy verification.